Diversity Of Mammals

The four characteristics of mammals are hair, mammary glands, a middle ear containg three bones, and a jaw that let their chew their food

The tree types of mammles are

monotremes

Duck-billed platypus

Echidna

mammles that lay eggs

Marsupials

mammles that give birth to under undeveloped, immature young that grow to maturity

Eutherian

mammles that give birth to live young that have completed fetal development

Ectothermic characteristics for reptiles are cover by dry scales or plates and reproduce by lying tough outer coating eggs. Endotherms are organisms that use their own metabolic heat to keep their tissues warm. Reptiles do not have endotherms.

Page 793 in textbook

page 805-809 in textbook

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